Lost part of my rally center cap

Nope, 75 and later, the center pops/snaps in place.....think it had somethin to due with how the fullsize spare tire/rally's wheel mounted in the trunk so you wouldn't have to remove the whole center cap.
never thought about that, it makes sense.

I knew they were removable on some years , but never knew why

did the spare come with a centercap?